Prepare the cure: Crush peppercorns and combine with kosher salt and brown sugar.
Check the salmon: Remove any pin bones with tweezers. Pat the fish dry.
Season with alcohol: Place the salmon skin‑side down on parchment; drizzle aquavit (or your chosen spirit) over the flesh and rub it in.
Apply cure and herbs: Spread the salt‑sugar mixture evenly over the flesh and top generously with chopped dill.
Wrap and weight: Wrap the salmon tightly in plastic, place it in a dish and lay a cutting board or plate on top, weighed down with cans or jars. Refrigerate for 12 hours.
Flip and baste: After 12 hours, unwrap the salmon, baste it with the accumulated juices, flip it over, rewrap and refrigerate for another 12 hours. Repeat once more; total curing time is ~36 hours.
Finish and slice: Unwrap, gently scrape off excess cure and dill, pat dry and slice very thinly at an angle. Use a long, sharp knife for the cleanest slices.